| Keystone to Oliveira de Frades | 4,204.20 mi (6,766.01 km) |
| Keystone to Oliveira do Bairro | 4,191.25 mi (6,745.16 km) |
| Keystone to Oliveira do Hospital | 4,226.39 mi (6,801.72 km) |
| Keystone to Ourem | 4,201.88 mi (6,762.27 km) |
| Keystone to Ovar | 4,178.91 mi (6,725.31 km) |
| Keystone to Pacos de Ferreira | 4,184.51 mi (6,734.32 km) |
| Keystone to Palmela | 4,202.66 mi (6,763.52 km) |
| Keystone to Paredes | 4,188.93 mi (6,741.43 km) |
| Keystone to Paredes de Coura | 4,166.46 mi (6,705.27 km) |
| Keystone to Penacova | 4,206.30 mi (6,769.39 km) |
| Keystone to Penafiel | 4,191.33 mi (6,745.29 km) |
| Keystone to Peniche | 4,165.33 mi (6,703.46 km) |
| Keystone to Peso da Regua | 4,217.67 mi (6,787.68 km) |
| Keystone to Pinhal Novo | 4,200.83 mi (6,760.59 km) |
| Keystone to Pinhel | 4,259.89 mi (6,855.63 km) |
